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Collective Concerted Motion in a Molecular Adlayer Visualized through the Surface Diffusion of Isolated Vacancies

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Urban, Christian and Otero, Roberto and Ecija, David and Trelka, Marta and Martín, Nazario and Gallego, José María and Miranda, Rodolfo (2016) Collective Concerted Motion in a Molecular Adlayer Visualized through the Surface Diffusion of Isolated Vacancies. The Journal of Chemical Physics, 145 . ISSN 0021-9606

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Official URL: http://aip.scitation.org/doi/10.1063/1.4964862



Abstract

We have measured STM movies to study the diffusion of individual vacancies in a self-assembled layer of a tetrathiafulvalene derivative (exTTF) on Au(111) at room temperature. The diffusion is anisotropic, being faster along the compact direction of the molecular lattice. A detailed analysis of the anisotropic displacement distribution of the single vacancies shows that the relative abundance of double jumps (that is, the collective motion of molecular dimers) with respect to single jumps is rather large, the number of double jumps being more than 20% of the diffusion events. We conjecture that the relative abundances of long jumps might be related to the strength of the intermolecular bonding and the misfit of the molecular overlayer with the substrate lattice.


Item Type:Article
Uncontrolled Keywords:Anisotropy; Diffusion; Gold
Subjects:Sciences > Chemistry > Chemistry, Organic
ID Code:41706
Deposited On:07 Mar 2017 14:05
Last Modified:21 Oct 2017 23:01

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